EP1084687B1 - Absorbierender Artikel mit zusammengesetzter Brückenklappe - Google Patents
Absorbierender Artikel mit zusammengesetzter Brückenklappe Download PDFInfo
- Publication number
- EP1084687B1 EP1084687B1 EP00127719A EP00127719A EP1084687B1 EP 1084687 B1 EP1084687 B1 EP 1084687B1 EP 00127719 A EP00127719 A EP 00127719A EP 00127719 A EP00127719 A EP 00127719A EP 1084687 B1 EP1084687 B1 EP 1084687B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- article
- waistband
- bridge flap
- absorbent
- flap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
- A61F13/49466—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the waist region
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/49007—Form-fitting, self-adjusting disposable diapers
- A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
- A61F13/49011—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
- A61F13/5633—Supporting or fastening means specially adapted for diapers or the like open type diaper
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
- A61F13/5633—Supporting or fastening means specially adapted for diapers or the like open type diaper
- A61F13/5644—Supporting or fastening means specially adapted for diapers or the like open type diaper having more than one pair of fasteners
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
- A61F13/565—Supporting or fastening means specially adapted for diapers or the like pants type diaper
- A61F13/5655—Supporting or fastening means specially adapted for diapers or the like pants type diaper adjustable pants type diapers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/56—Supporting or fastening means
- A61F13/64—Straps, belts, ties or endless bands
Definitions
- the present invention relates to absorbent articles configured to absorb and retain liquids. More particularly, the present invention relates to absorbent articles having an improved resistance to leakage past the waistband portions of the article.
- Absorbent articles such as disposable diapers, have employed various types of absorbent structures to absorb and hold body wastes, such as urine.
- Typical absorbent articles have included absorbent pads composed of cellulosic fluff and superabsorbent polymer materials.
- selected sections of the absorbent articles have incorporated elastic members to provide elasticized sealing and gasketing.
- leg elastics have been employed to reduce leakage past the leg opening portions of the absorbent articles.
- waist elastic members have been employed to reduce leakage past the waistband edges of the articles.
- liquid impermeable or moisture repellent barriers have been placed along selected edge regions of the absorbent pads.
- Further configurations of the absorbent articles have incorporated internal, elasticized containment flaps to provide pockets which restrict the sideways movement of waste liquids. For example, see U.S. Patent 4,704,116 issued November 3, 1987, to K. Enloe. Internal, elasticized waist flaps have also been employed to restrict the movement of waste liquids past the waistband edges of the article.
- EP-A-0 528 282 discloses an absorbent article as set out in the preamble of claim 1.
- the present invention provides a distinctive absorbent article having a front waistband portion, a back waistband portion, and an intermediate portion which interconnects the front and back waistband portions.
- the article comprises a backsheet layer, and an absorbent retention portion superposed on the backsheet layer.
- a liquid permeable topsheet layer is superposed on the retention portion and connected to sandwich the retention portion between the topsheet and backsheet layers.
- the invention provides an absorbent article having at least one elasticized side panel connected to a lateral end region of the back waistband portion of the article.
- the side panel is constructed for interconnecting with the article about a wearer's body to thereby form an assembled bridge flap which is arranged to provide a bodyside surface for contacting the wearer's body.
- the article includes fastening means for securing the article front waistband portion to the article back waistband portion to thereby encircle the wearer with the waistband portions.
- the article also includes a waistband-edge attaching means for securing a waistband edge of the assembled bridge flap to the front waistband portion of the article.
- the absorbent article can have a pair of elasticized side panels connected at laterally opposed end regions of the back waistband portion of the article, and each of the side panels can include a portion of the waistband-edge attaching means.
- the at least one elasticized side panel can optionally include a foldable section which extends length-wise past a longitudinally terminal edge of the backsheet layer.
- Fold attaching means hold the foldable sections of the side panels in a C-folded condition which wraps about a laterally extending, terminal edge of the article front waistband portion.
- the absorbent article can have a pair of elasticized side panels connected at laterally opposed end regions of the back waistband portion of the article.
- Each of the side panels can include a foldable section which extends length-wise past a longitudinally terminal edge of the backsheet layer.
- the side panels may be substantially equal or unequal in size, and are constructed for interconnecting with each other about a wearer's body to thereby form the assembled bridge flap.
- the present invention can advantageously improve the fit of the absorbent article by reducing rollover at the waist and reducing sagging.
- the article can also reduce urine leakage, particularly past the waistband edges of the article.
- the absorbent structures of the present invention will be described herein in relationship to their use in disposable absorbent articles, but it should be understood that potential uses of the absorbent structures of the present invention need not be limited to disposable absorbent articles.
- the term "disposable absorbent article” refers to articles which absorb and contain body exudates and are intended to be discarded after a limited period of use. The articles are not intended to be laundered or otherwise restored for reuse. The articles can be placed against or in proximity to the body of the wearer to absorb and contain various exudates discharged from the body.
- an absorbent article such as diaper 10
- the bodyside of the diaper which is appointed to contact the wearer, is facing the viewer.
- the outer edges of the diaper define a periphery 18, along which the longitudinally extending side edge margins are designated 20 and the laterally extending end edge margins are designated 22.
- the side edges are curvilinear and contoured to define leg openings for the diaper.
- the end edges are shown as straight, but optionally, may be curvilinear, as desired.
- the diaper additionally has a width-wise, transverse dimension 24 and a length-wise, longitudinal dimension 26.
- the absorbent article includes a front waistband portion 12, a back waistband portion 14, and an intermediate portion 16 which interconnects the front and back waistband portions.
- the article includes a backsheet layer 30, and an absorbent body, such as a structure including absorbent retention portion 48, superposed on the backsheet layer 30.
- a liquid permeable topsheet layer 28 is superposed on the retention portion 48 and connected to sandwich the retention portion between the topsheet and the backsheet layers.
- a laterally extending bridge flap 80 is configured to extend over a body-facing surface of at least one waistband portion of the article.
- the bridge flap 80 has an elasticized, laterally extending substantially fixed edge region 82 attached to the at least one waistband portion of the article.
- the bridge flap also has an elasticized, laterally extending movable edge region 84 positioned longitudinally inboard of the substantially fixed edge region 82, and has longitudinally extending, substantially fixed side edge regions 86 located at laterally opposed side ends of the bridge flap.
- the bridge flap has a selected width dimension 90 which extends laterally between the bridge flap side edge regions 86, and a selected length dimension 88 which extends longitudinally between the fixed and movable bridge flap edge regions 82 and 84, respectively.
- the bridge flap width is at least about 15 cm
- the bridge flap length dimension is at least about 2.5 cm.
- the bridge flap movable edge region 84 has an elasticized, lateral retractability of at least about 10 percent, as determined with respect to its contracted gathered width, and has an elastic tension within the range of about 40-150 gm-force, as determined when the movable edge region 84 is extended to a flat-out configuration of the bridge flap.
- an absorbent article such as diaper 10, has a front waistband portion 12, a back waistband portion 14, and an intermediate portion 16 which interconnects the front and back waistband portion.
- the article includes a backsheet layer 30, and an absorbent retention portion 48 superposed on the backsheet layer.
- a liquid permeable topsheet layer 28 is superposed on the retention portion 48 and connected to sandwich the retention portion between the topsheet layer and backsheet layers 28 and 30, respectively.
- a laterally extending, elasticized bridge flap 80 is connected to extend over an appointed body-facing surface of the article, and is constructed to extend laterally beyond opposed side edge regions, such as edge regions 44, of at least one waistband portion of the backsheet layer 30. In the illustrated example, the bridge flap is associated with the front waistband portion 12 of the article.
- the bridge flap can be associated with the article back waistband portion 14, or with both the front and back waistband portions 12 and 14 of the article.
- the bridge flap 80 has a laterally extending, substantially fixed edge region 82 attached to the at least one waistband portion of the article, and a laterally extending movable edge region 84 positioned longitudinally inboard of the substantially fixed edge region 82.
- an absorbent article has a front waistband portion 12, a back waistband portion 14, and an intermediate portion 16 which interconnects the front and back waistband portions.
- the article includes a backsheet layer 30, and an absorbent retention portion 48 superposed on the backsheet layer.
- a liquid permeable topsheet layer 28 is superposed on the retention portion 48 and connected to sandwich the retention portion between the topsheet and backsheet layers.
- At least one elasticized side panel 58 is connected to at least one end region 40 of the back waistband portion 14 of the article.
- the side panel 58 is constructed for interconnecting with a cooperating section of the article about a wearer's body to thereby form an assembled bridge flap 180 (e.g. Fig. 8).
- the assembled bridge flap is arranged to provide a bodyside surface for contacting the wearer.
- a fastening means such as flap fasteners 74 can be employed to form the connections that generate the assembled bridge flap.
- the flap fasteners 74 can be provided by adhesives, cohesives, snaps, hooks, VELCRO® fasteners and the like, as well as combinations thereof.
- Article fastening means such as fastener tabs 36, secure the article front waistband portion 12 to the article back waistband portion 14 to thereby encircle the wearer with the article waistband portions.
- the absorbent article can include a pair of elasticized side panels 58 connected at laterally opposed end regions of the back waistband portion 14 of the article, and each of the side panels 58 includes an operable portion of the waistband-edge attaching means 112.
- the at least one side panel 58 may optionally include a foldable section 60 which extends longitudinally and protrudes length-wise past a longitudinally terminal edge 94 of the backsheet layer 30.
- the waistband-edge attaching means can be configured to provide a suitable fold attachment means 104.
- the fold attachments 104 can be constructed to hold the foldable sections 60 of the side panels 58 in a C-folded condition which when in use can wrap about a laterally extending, terminal edge 96 of the article front waistband portion 12.
- a pair of the laterally opposed, elasticized side panels 58 can be connected at laterally opposed end regions 40 of the back waistband portion 14 of the article, and each of the side panels 58 can include a foldable section 60 which extends longitudinally past a longitudinally terminal edge 94 of the backsheet layer 30.
- the elasticized side panels 58 are constructed for interconnecting with each other about a wearer's body to thereby form the assembled bridge flap 180 (Fig. 8).
- the assembled bridge flap is arranged to provide a bodyside surface for contacting the wearer, and the flap fastening means, such as provided by flap fasteners 74, can provide the interconnections employed to form the assembled bridge flap.
- Article fastening means such as provided by fastener tabs 36, can then secure the article front waistband portion 12 to the article back waistband portion 14 to thereby encircle the wearer with the article waistband portions.
- An attaching means such as fold attachments 104, hold the foldable sections 60 of the side panels 58 in a C-folded condition which when in use can wrap about a laterally extending, terminal edge 96 of the article front waistband portion 12.
- the side panels may be unequal in size (Fig. 7) or substantially equal in size, and are constructed for interconnecting with each other about a wearer's body to thereby form the assembled bridge flap.
- the article represented by diaper 10 includes a liquid permeable topsheet 28; a substantially liquid impermeable backsheet 30; an absorbent body, such as an absorbent structure 32, positioned and operably connected between the topsheet and backsheet; a surge management layer 46 positioned adjacent a major facing surface of topsheet 28; fastener tabs 36; and leg elastic members 34.
- the various components of the article may be assembled in a variety of well-known configurations.
- the various components of the article may be operably interconnected and attached employing conventional securing mechanisms, such as adhesive bonds, sonic bonds, thermal bonds or any other securing means known in the art.
- a uniform continuous layer of adhesive, a patterned layer of adhesive, a sprayed pattern of adhesive or an array of separate lines, swirls or spots of construction adhesive may be employed.
- topsheet 28 and backsheet 30 can be generally coextensive and can have length and width dimensions which are generally larger than the corresponding dimensions of absorbent structure 32.
- Topsheet 28 is associated with and superimposed on backsheet 30, thereby defining the periphery 18 of diaper 10, which delimits the outer perimeter or the edges of the diaper 10.
- the diaper 10 has front and back waistband regions 12 and 14, respectively extending from the laterally extending end edges 22 of diaper periphery 18 toward the transverse center line of the diaper along a distance of from about 2 percent to about 10 percent and preferably about 5 percent of the length of diaper 10.
- the waistband regions comprise those upper portions of diaper 10, which when worn, wholly or partially cover or encircle the waist or mid-lower torso of the wearer.
- backsheet 30 provides front and/or rear waistbands 12, 14 which are substantially impermeable to liquid.
- backsheet 30 may provide front and/or rear waistbands 12, 14 which are substantially impermeable to both liquid and air.
- the intermediate, crotch region 16 lies between and interconnects waistband regions 12 and 14.
- the crotch region comprises that portion of diaper 10 which, when worn, is positioned between the legs of the wearer and covers the lower torso of the wearer.
- the crotch region 16 is an area where repeated fluid surges typically occur in diaper 10 or other absorbent article.
- Topsheet 28 presents a body-facing surface which is compliant, soft-feeling, and non-irritating when contacting the wearer's skin. Further, topsheet 28 can be less hydrophilic than retention portion 48, and is sufficiently porous to be liquid permeable, permitting liquid to readily penetrate through its thickness.
- a suitable topsheet 28 may be manufactured from a wide selection of web materials, such as porous foams, reticulated foams, apertured plastic films, natural fibers (for example, wood or cotton fibers), synthetic fibers (for example, polyester or polypropylene fibers), or a combination of natural and synthetic fibers. Topsheet 28 is typically employed to help isolate the wearer's skin from liquids held in absorbent structure 32.
- topsheet 28 Various woven and nonwoven fabrics can be used for topsheet 28.
- the topsheet may be composed of a meltblown or spunbonded web of polyolefin fibers.
- the topsheet may also be a bonded-carded-web composed of natural and synthetic fibers.
- nonwoven web refers to a web of material which is formed without the aid of a textile weaving or knitting process.
- fabrics refers to all of the woven, knitted and nonwoven fibrous webs.
- topsheet fabrics may be composed of a substantially hydrophobic material, and the hydrophobic material may optionally be treated with a surfactant or otherwise processed to impart a desired level of wettability and hydrophilicity.
- topsheet 28 is a nonwoven, spunbond polypropylene fabric composed of about 2.8-3.2 denier fibers formed into a web having a basis weight of about 20 gsm and density of about 0.06 g/cm 3 .
- the fabric is surface treated with about 0.28% Triton X-102 surfactant.
- two containment flaps 62 are connected to the bodyside surface of topsheet layer 28, and extend longitudinally along the article in a generally parallel configuration. Details regarding suitable constructions and arrangements for containment flaps 62 are described, for example, in U.S. Patent 4,704,116 issued November 3, 1987, to K. Enloe. Other suitable containment flap configurations are described in US-A-5,562,650 (U.S. Patent Application Serial No. 208,816) of R. Everett et al., filed March 4, 1994 and entitled ABSORBENT ARTICLE HAVING AN IMPROVED SURGE MANAGEMENT.
- Containment flaps 62 are attached to topsheet layer 28 along fixed edges 64 of the flaps.
- a movable edge 66 of each containment flap includes a flap elastic member 68 comprising one or more individual strands of elastomeric material.
- a plurality of elastic strands may be configured in a spatially separated, generally parallel arrangement, and a suitable elastic strand can, for example, be composed of a 470 decitex Lycra elastomer.
- Elastic member 68 is connected to the movable edge of the containment flap in an elastically contractible condition such that the contraction of the elastic components thereof gathers and shortens the edge of the containment flap.
- each containment flap tends to position itself in a spaced relation away from the bodyside surfaces of topsheet 28 and/or surge management portion 46 toward a generally upright and approximately perpendicular configuration, especially in the crotch section of the diaper.
- the containment flaps may be constructed of a material which is the same as or different than the material comprising topsheet 28. In optional embodiments, the containment flaps may be constructed of a material which is the same as or different than the material comprising surge management portion 46.
- the containment flaps may be composed of a material which is air permeable, liquid permeable, substantially liquid impermeable or combinations thereof.
- Backsheet 30 may be composed of a liquid permeable material, but preferably comprises a material which is configured to be substantially impermeable to liquids.
- a typical backsheet can be manufactured from a thin plastic film, or other flexible liquid-impermeable material.
- the term "flexible” refers to materials which are compliant and which will readily conform to the general shape and contours of the wearer's body.
- Backsheet 30 prevents the exudates contained in absorbent structure 32 from wetting articles such as bedsheets and overgarments which contact diaper 10.
- the backsheet may be a unitary layer of material or may be a composite layer composed of multiple components assembled side-by-side or laminated.
- backsheet 30 can include protruding ear sections which extend laterally at the waistband portions 12 and 14 of the diaper.
- the ear sections cooperate with the crotch section of backsheet 30 to operably provide leg opening regions for positioning about the legs of the wearer.
- backsheet 30 is a polyethylene film having a thickness of from about 0.012 millimeters to about 0.051 millimeters.
- the backsheet is a film having a thickness of about 0.032 millimeters.
- Alternative constructions of the backsheet may comprise a woven or nonwoven fibrous web layer which has been totally or partially constructed or treated to impart the desired levels of liquid impermeability to selected regions that are adjacent or proximate the absorbent body.
- a terminal edge of the substantially liquid impermeable backsheet material extends to a position which is substantially coterminous with a front or rear waistband edge of the backsheet member.
- a polymer film comprising backsheet 30 extends to a position which is substantially coterminous with a front or rear waistband edge of the backsheet.
- Backsheet 30 typically provides the outer cover of the article.
- the article backsheet may comprise one or more separate layers which are in addition to the outer cover layer and may be interposed between the outer cover layer and the absorbent structure.
- Backsheet 30 may optionally be composed of a micro-porous, "breathable" material which permits water vapor to escape from absorbent structure 32 while still preventing liquid exudates from passing through the backsheet.
- the breathable backsheet may be composed of a microporous polymer film or a nonwoven fabric which has been coated or otherwise treated to impart a desired level of liquid impermeability.
- a suitable microporous film is a PMP-1 material, which is available from Mitsui Toatsu Chemicals, Inc., a company having offices in Tokyo, Japan; or an XK0-8044 polyolefin film available from 3M Company of Minneapolis, Minnesota.
- the backsheet can also be embossed or otherwise be provided with a matte finish to exhibit a more aesthetically pleasing appearance.
- backsheet 30 is typically determined by the size of absorbent structure 32 and the exact diaper design selected.
- Diaper 10 may, for example, have a generally T-shape, a generally I-shape or a modified hourglass shape, and can define front and/or rear ear portions 38.
- the backsheet may extend beyond the terminal edges of absorbent structure 32 by a selected distance.
- Topsheet 28 and backsheet 30 are connected or otherwise associated together in an operable manner.
- the term "associated" encompasses configurations in which topsheet 28 is directly joined to backsheet 30 by affixing topsheet 28 directly to backsheet 30, and configurations wherein topsheet 28 is joined to backsheet 30 by affixing topsheet 28 to intermediate members which in turn are affixed to backsheet 30.
- Topsheet 28 and backsheet 30 can be affixed directly to each other in the diaper periphery 18 by attachment means (not shown) such as an adhesive, sonic bonds, thermal bonds or any other attachment means known in the art.
- attachment means such as an adhesive, sonic bonds, thermal bonds or any other attachment means known in the art.
- a uniform continuous layer of adhesive, a patterned layer of adhesive, a sprayed pattern of adhesive or an array of separate lines, swirls or spots of construction adhesive may be used to affix topsheet 28 to backsheet 30.
- Fastening means such as tape tab fasteners 36
- Tape tab fasteners 36 are typically applied at the lateral, side ends of the back waistband region 14 of diaper 10 to provide a mechanism for holding the diaper on the wearer in a conventional manner.
- Tape tab fasteners 36 can be any of those well known in the art, and are typically applied to the corners of diaper 10.
- the article fasteners 36 can be provided by adhesives, cohesives, snaps, hooks, VELCRO® fasteners and the like, as well as combinations thereof.
- Suitable adhesive tape fasteners are described in U.S. Patent 5,147,347 issued September 15, 1992 to Y. Huang et al.
- Other suitable fastening systems are described in EP-A-0 734 243 U.S. Patent Application Serial No. 168,615 of T. Roessler et al., entitled DYNAMIC FITTING DIAPER and filed December 16, 1993).
- Elastic members 34 are disposed adjacent periphery 18 of diaper 10. Along each side edge region 20, leg elastic members 34 are arranged to draw and hold diaper 10 against the legs of the wearer. Waist elastic members may optionally be disposed adjacent either or both of the end edges 22 of diaper 10 to provide elasticized waistbands.
- the various elastic members are secured to diaper 10 in an elastically contractible condition so that in a normal under strain configuration, the elastic members effectively contract against diaper 10.
- the elastic members can be secured in an elastically contractible condition in at least two ways, for example, the elastic members may be stretched and secured while diaper 10 is in an uncontracted condition.
- diaper 10 may be contracted, for example, by pleating, and the elastic members secured and connected to diaper 10 while the elastic members are in their relaxed or unstretched condition.
- Still other means, such as heat-shrink elastic material may be used to gather the garment.
- leg elastic members 34 extend essentially along the complete length of crotch region 16 of diaper 10.
- elastic members 34 may extend the entire length of diaper 10, or any other length suitable providing the arrangement of elastically contractible lines desired for the particular diaper design.
- Elastic members 34 may have any of a multitude of configurations.
- the width of the individual elastic members 34 may be varied from 0.25 millimeters (0.01 inches) to 25 millimeters (1.0 inches) or more.
- the elastic members may comprise a single strand of elastic material, or may comprise several separate, parallel or non-parallel strands of elastic material, or may be applied in a rectilinear or curvilinear arrangement. Where the strands are non-parallel, two or more of the strands may intersect or otherwise interconnect within the elastic member.
- the elastic members may be affixed to the diaper in any of several ways which are known in the art.
- the elastic members may be ultrasonically bonded, heat and pressure sealed using a variety of bonding patterns, or adhesively bonded to diaper 10 with sprayed or swirled patterns of hotmelt adhesive.
- the various configurations of the invention may have the elastic members located on the inward-most, bodyside surface of topsheet 28.
- the elastic members may be interposed between topsheet 28 and backsheet 30.
- the leg elastic members 34 may comprise a carrier sheet 37 to which are attached a grouped set of elastics composed of a plurality of individual elastic strands 39.
- the elastic strands may intersect or be interconnected, or be entirely separated from each other.
- the carrier sheet may, for example, comprise a 0.002 cm thick film of unembossed polypropylene material.
- the elastic strands can, for example, be composed of Lycra® elastomer available from DuPont, a business having offices in Wilmington, Delaware. Each elastic strand is typically within the range of about 620-1050 decitex (dtx), and can be about 940 dtx in an embodiment of the invention wherein three strands are employed for each elasticized legband.
- Leg elastics 34 may be generally straight or optionally curved.
- the curved elastics can be inwardly bowed toward the longitudinal centerline of the diaper with the innermost point (or apex, relative to the cross-direction of the article) of the set of curved elastic strands positioned approximately 1.9-3.8 centimeters (about 0.75-1.5 inches) inward from the outer most edge of the set of elastic strands.
- the curvature of the elastics may not be configured or positioned symmetrically relative to the lateral centerline of the diaper. As representatively shown in Fig.
- the curved elastics may have an inwardly bowed and outwardly bowed, reflexed-type of curvature, and the length-wise center of the elastics may be offset by a selected distance within the range of about 0-12 cm toward either the front or rear waistband of the diaper to provide desired fit and appearance.
- the elastic members can be composed of an elastomeric, cloth-like nonwoven fibrous material, such as an elastomeric stretch-bonded laminate (SBL) web or an elastomeric meltblown web.
- SBL stretch-bonded laminate
- suitable meltblown elastomeric fibrous webs for forming the elastic members are described in U.S. Patent 4,663,220 issued May 5, 1987, to T. Wisneski, et al.
- composite fabrics comprising at least one layer of nonwoven textile fabric secured to a fibrous elastic layer are described in European Patent Application EPA 0 110 010 published April 8, 1987, with the inventors listed as J. Taylor et al..
- the composite nonwoven fabrics are commonly referred to as stretch-bonded laminates.
- the elastic members can be composed of an elastomeric, stretchable composite web comprising individual, discrete strips of elastomeric material secured to one or more nonwoven fibrous layers.
- a composite web may, for example, comprise an elastomeric meltblown material arranged in a selected pattern of strips and suitably sandwiched and attached between two layers of nonwoven, spunbonded fibrous material.
- the composite web may alternatively comprise a selected pattern of individual elastomeric strips operably secured to a nonwoven fibrous layer or between two nonwoven layers.
- the elastomer strips may, for example, be composed of a thermoplastic, melt extrudable material.
- Suitable elastomer materials include polyether-polyamide block copolymers, polyurethanes, synthetic linear A-B-A and A-B block copolymers, chlorinated rubber/EVA (ethylene-vinyl acetate) blends, EPDM (ethylene-propylene diene monomer) rubbers, EPM (ethylene-propylene monomer) rubbers, blends of EPDM/EPM/EVA, and the like.
- An absorbent body such as provided by absorbent structure 32, is positioned between topsheet 28 and backsheet 30 to form diaper 10.
- the absorbent body has a construction which is generally compressible, conformable, non-irritating to the wearer's skin.
- the absorbent structure may comprise a single, integral piece of material, or alternatively, may comprise a plurality of individual separate pieces of material which are operably assembled together.
- the absorbent structure comprises a single, substantially integral piece of material, the material could include the desired structural features formed into selected spatial regions thereof.
- the absorbent structure comprises multiple pieces, the pieces may be configured as discrete layers or as other nonlayered shapes and configurations.
- each of the individual pieces may be coextensive or non-coextensive, depending upon the requirements of the product. It is preferred, however, that each of the individual pieces be arranged in an operable, intimate contact along at least a portion of its boundary with at least one other adjacent piece of the absorbent structure. Alternatively, each piece is connected to an adjacent portion of the absorbent structure by a suitable bonding and/or fiber entanglement mechanism, such as ultrasonic or adhesive bonding, or mechanical or hydraulic needling.
- Absorbent structure 32 includes a back section and a front section, and provides a liquid acquisition, target zone.
- the target zone encompasses the area where repeated liquid surges typically occur in absorbent structure 32.
- the particular location where liquid is discharged, such as during urination, can vary depending on the age and gender of the wearer.
- the target zone is a section of absorbent structure 32 which is located in the front 60% of the length of the absorbent structure.
- Either or both of the back and front sections can include laterally extending ear regions 38 which provide greater width at the waistband sections of the article.
- the ear regions are configured to extend about the sides of the wearer's waist and torso.
- the representatively shown absorbent structure has a contoured, curvilinear periphery, particularly along its side edges. The two generally mirror-image, inwardly bowed, lateral edges provide for a narrower intermediate section suitable for positioning in the crotch of the wearer.
- retention portion 48 can be asymmetrically located along the length of backsheet 30, with at least about 45 percent of the length of the retention portion located in a front half-section of backsheet 30. Alternatively, at least about 55 percent of the retention portion length is located in the front half-section of backsheet 30, and optionally, at least about 65 percent of the retention portion length is located in the front half-section of the backsheet to provide desired attributes. Similar asymmetric positionings of the surge management portion 46 may also be employed.
- Absorbent structure 32 may be manufactured in a wide variety of sizes and shapes (for example, rectangular, trapezoidal, T-shape, I-shape, hourglass shape, etc.) and from a wide variety of materials.
- the size and the absorbent capacity of absorbent structure 32 should be compatible with the size of the intended wearer and the liquid loading imparted by the intended use of the absorbent article. Further, the size and the absorbent capacity of absorbent structure 32 can be varied to accommodate wearers ranging from infants through adults.
- the densities and/or basis weights of the respective surge management 46 and retention 48 portions, as well as their relative ratios can be varied.
- absorbent structure 32 can be generally T-shaped with the laterally extending cross-bar of the "T" generally corresponding to the front waistband portion of the absorbent article for improved performance, especially for male infants.
- the absorbent structure across the ear section of the front waistband region of the article has a cross-directional width of about 9 inches (about 23 cm)
- the narrowest portion of the crotch section has a width of about 3.5 inches (about 8.9 cm)
- the back waistband region has a width of about 4.5 inches (about 11.4 cm).
- the absorbent structure has an absorbent capacity of at least about 100 g of saline.
- the absorbent capacity can be at least about 200 g of saline.
- the absorbent structure has an absorbent capacity of at least about 300 g of saline, and optionally has an absorbent capacity of at least about 400 g of saline to provide improved performance.
- Suitable fibers include naturally occurring organic fibers composed of intrinsically wettable material, such as cellulosic fibers; synthetic fibers composed of cellulose or cellulose derivatives, such as rayon fibers; inorganic fibers composed of an inherently wettable material, such as glass fibers; synthetic fibers made from inherently wettable thermoplastic polymers, such as particular polyester or polyamide fibers; and synthetic fibers composed of a nonwettable thermoplastic polymer, such as polypropylene fibers, which have been hydrophilized by appropriate means.
- suitable fibers include naturally occurring organic fibers composed of intrinsically wettable material, such as cellulosic fibers; synthetic fibers composed of cellulose or cellulose derivatives, such as rayon fibers; inorganic fibers composed of an inherently wettable material, such as glass fibers; synthetic fibers made from inherently wettable thermoplastic polymers, such as particular polyester or polyamide fibers; and synthetic fibers composed of a nonwettable thermoplastic polymer, such as polypropylene fibers, which have been hydrophil
- the fibers may be hydrophilized, for example, by treatment with silica, treatment with a material which has a suitable hydrophilic moiety and is not readily removable from the fiber, or by sheathing the nonwettable, hydrophobic fiber with a hydrophilic polymer during or after the formation of the fiber.
- a material which has a suitable hydrophilic moiety and is not readily removable from the fiber or by sheathing the nonwettable, hydrophobic fiber with a hydrophilic polymer during or after the formation of the fiber.
- selected blends of the various types of fibers mentioned above may also be employed.
- the term "hydrophilic” refers to fibers or the surfaces of fibers which are wetted by the aqueous liquids in contact with the fibers.
- the degree of wetting of the materials can, in turn, be described in terms of the contact angles and the surface tensions of the liquids and materials involved.
- Equipment and techniques suitable for measuring the wettability of particular fiber materials or blends of fiber materials used for components of the invention can be provided by a Cahn SFA-222 Surface Force Analyzer System. When measured with this system, fibers having contact angles less than 90° are designated “wettable”, while fibers having contact angles greater than 90° are designated “nonwettable”.
- the retention portion 48 can contain at least about 25 weight percent (wt%) of high absorbency material.
- the retention portion can contain at least about 50 wt% of high absorbency material, and optionally can contain at least about 75 wt% of high absorbency material to provide desired benefits.
- the high-absorbency material employed with the various embodiments of the invention may comprise absorbent gelling materials, such as superabsorbents.
- Absorbent gelling materials can be natural, synthetic and modified natural polymers and materials.
- the absorbent gelling materials can be inorganic materials, such as silica gels, or organic compounds such as cross-linked polymers.
- cross-linked refers to any means for effectively rendering normally water-soluble materials substantially water insoluble but swellable. Such means can include, for example, physical entanglement, crystalline domains, covalent bonds, ionic complexes and associations, hydrophilic associations, such as hydrogen bonding, and hydrophobic associations or Van der Waals forces.
- Examples of synthetic absorbent gelling material polymers include the alkali metal and ammonium salts of poly(acrylic acid) and poly (methacrylic acid), poly(acrylamides), poly(vinyl ethers), maleic anhydride copolymers with vinyl ethers and alpha-olefins, poly(vinyl pyrrolidone), poly(vinylmorpholinone), poly(vinyl alcohol), and mixtures and copolymers thereof.
- Further polymers suitable for use in the absorbent structure include natural and modified natural polymers, such as hydrolyzed acrylonitrile-grafted starch, acrylic acid grafted starch, methyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose, and the natural gums, such as alginates, xanthan gum, locust bean gum and the like. Mixtures of natural and wholly or partially synthetic absorbent polymers can also be useful in the present invention.
- Other suitable absorbent gelling materials are disclosed by Assarsson et al. in U.S. Patent 3,901,236 issued August 26, 1975. Processes for preparing synthetic absorbent gelling polymers are disclosed in U.S. Patent 4,076,663 issued February 28, 1978 to Masuda et al. and U.S. Patent 4,286,082 issued August 25, 1981 to Tsubakimoto et al.
- Synthetic absorbent gelling materials typically are xerogels which form hydrogels when wetted.
- hydrogel has commonly been used to also refer to both the wetted and unwetted forms of the material.
- the high-absorbency material used in retention portion 48 is generally in the form of discrete particles.
- the particles can be of any desired shape, for example, spiral or semi-spiral, cubic, rod-like, polyhedral, etc. Shapes having a large greatest dimension/smallest dimension ratio, like needles, flakes, and fibers, are also contemplated for use herein.
- Conglomerates of particles of absorbent gelling material may also be used in retention portion 48. Desireable for use are particles having an average size of from about 20 micrometers to about 1 millimeter.
- Selected superabsorbent polymers having improved absorbent properties can be important for maximizing the performance while retaining the desired thinness of the absorbent article.
- the high-absorbency material can be configured to exhibit a Deformation Under Load which is about 0.6 millimeter or less.
- the high-absorbency material can exhibit a Wicking Index which is about 10 centimeters or greater, and the Absorbent Capacity of the high-absorbency material is about 28 grams per gram or greater.
- the high-absorbency material can exhibit a Wicking Parameter which is about 700 or greater, preferably is about 800 or greater, more preferably is about 850 or greater, and most preferably is about 900 or greater.
- the high-absorbency material can exhibit an Absorbency Under Load (measured at a pressure of 0.57 psi) which is about 13 or greater.
- An example of a suitable superabsorbent polymer is SANWET IM3900 polymer, which is available Hoechst Celanese, a business having offices in Portsmouth, Virginia.
- a superabsorbent material relates to the ability of the superabsorbent material to absorb a liquid not only while under a single given restraining force, such as about 0.3 pound per square inch (about 2 kPa), but also over a broader range of restraining forces, such as about 0.01-0.9 pound per square inch (about 0.7-6.2 kPa).
- the ability of a superabsorbent material to absorb a liquid under a variety of different restraining pressures has, for the purposes of this application, been quantified as the Pressure Absorbency Index.
- Superabsorbent materials useful in the present invention may also suitably have a 16-hour extractables level of less than about 13 weight percent.
- a particular example of a high absorbency material suitable for use in the present invention is FAVOR SAB 870 superabsorbent polymer produced by Stockhausen, Inc., a business having offices in Greensboro, North Carolina.
- Suitable techniques for determining desired parameters are set forth in US-A-5,601,542; EP-A-0 615 736 (copending U.S. Patent Application Serial No. 016,312; entitled ABSORBENT COMPOSITE; of M. Melius et al.; filed on February 24, 1993) and in its associated continuation-in-part application filed on even date.
- retention portion 48 can comprise a matrix of hydrophilic fibers, such as a web of cellulosic woodpulp fluff, mixed with particles of high-absorbency material.
- retention portion 48 may comprise a mixture of superabsorbent hydrogel-forming particles and synthetic polymer meltblown fibers, or a mixture of superabsorbent particles with a fibrous coform material comprising a blend of natural fibers and/or synthetic polymer fibers.
- the superabsorbent particles may be substantially homogeneously mixed with the hydrophilic fibers, or may be nonuniformly mixed.
- the concentrations of superabsorbent particles may be arranged in a non-step-wise gradient through a substantial portion of the thickness (z-direction) of the retention portion, with lower concentrations toward the bodyside of the retention portion and relatively higher concentrations toward the outerside of the retention portion.
- Suitable z-gradient configurations are described in U.S. Patent 4,699,823 issued October 13, 1987 to Kellenberger et al..
- the superabsorbent particles may also be arranged in a generally discrete layer within the matrix of hydrophilic fibers.
- two or more different types of superabsorbent may be selectively positioned at different locations within or along the fiber matrix.
- the invention can, for example, be configured to provide a medium-size article which has been referred to as a "STEP 3" size diaper.
- Such articles can comprise a retention portion 48 in the form of a fluff pad which includes 4-25 grams of woodpulp fluff.
- the pad can alternatively include about 5-20 grams of fluff, and can optionally include about 6-15 grams of fluff to provide desired benefits.
- the woodpulp fluff generally provides shape and form to diaper 10, and carries and positions the particles of superabsorbent polymer or other high-absorbency material.
- the fluff pad can also contain about 1-16 grams of superabsorbent polymer, and in the shown embodiment, the retention portion can contain 4-12 grams superabsorbent polymer.
- the hydrophilic fibers and high-absorbency particles can be configured to form an average composite basis weight which is within the range of about 250-900 gsm. Again, such basis weight is particularly desireable in the target zone of the absorbent structure. In certain aspects of the invention, the average composite basis weight is within the range of about 400-800 gsm, and optionally is within the range of about 450-700 gsm to provide desired performance.
- the density of retention portion 48 or other component of the absorbent article can be calculated from its basis weight and thickness.
- the weight and thickness are measured with respect to samples taken from newly unpacked, unfolded and dry diapers at a restraining pressure of 0.2 psi (1.38 kPa).
- a suitable device is a TMI foam thickness gauge, Model No. TM1-49-21 or its equivalent. The apparatus was obtained from Testing Machines, Inc. of Amityville, New York.
- the fluff and superabsorbent particles can be selectively placed into desired zones of retention portion 48.
- the fluff basis weight may vary across the width dimension of retention portion 48.
- relatively larger amounts of fluff may be positioned toward the front waistband end of the retention portion.
- the majority of the superabsorbent material can be distributed down a medial region of retention portion 48 which extends along the length dimension of the retention portion.
- the superabsorbent material may have a selected zoned placement to reduce the amount of superabsorbent material located proximate both the side and end edges of the retention portion.
- the reduced amounts of superabsorbent material at the edges of the retention portion can help improve the containment of the superabsorbent particles within the fibrous fluff matrix of retention portion 48.
- the pulsed, zoned placement of the superabsorbent material can, for example, be achieved by the method and apparatus described in US-A-5,028,224 (copending U.S. Patent Application Serial No. 07/462,363 of C. Pieper et al. filed January 9, 1990, and entitled METHOD AND APPARATUS FOR INTERMITTENTLY DEPOSITING PARTICULATE MATERIAL IN A SUBSTRATE).
- the retention portion 48 composed of the absorbent fluff-superabsorbent matrix, can be laminated with or overwrapped in a hydrophilic high wet-strength web provided by one or more face sheets 70.
- the face sheet can, for example, include a high wet-strength tissue or a synthetic fibrous web. Such an overlying or overwrapping web can increase the in-use integrity of the absorbent structure.
- the face sheet structure may comprise a single layer of face sheet material, or may comprise a multi-element sheet which includes a separate bodyside face layer and a separate outerside face layer.
- each face layer can extend past all or some of the peripheral edges of retention portion 48.
- Such a configuration of the face sheet layers can, for example, facilitate the formation of a substantially complete sealing and closure around the peripheral edges of retention portion 48.
- the bodyside and outerside layers of face sheet 70 extend at least about 0.5 inch (about 1.27 cm) beyond the peripheral edges of the retention portion to provide an outwardly protruding, flange-type bonding area over which the periphery of the bodyside face sheet layer may be completely or partially connected to the periphery of the outerside face sheet layer.
- the bodyside and outerside layers of a multi-element face sheet 70 may be composed of substantially the same material, or may be composed of different materials.
- the outerside face sheet may be composed of a relatively lower basis weight material having a relatively high porosity, such as a wet strength cellulosic tissue composed of softwood pulp.
- an adhesive can be printed or otherwise applied onto the appointed bonding areas of the face sheet.
- a rotogravure-type adhesive applicator may be employed to selectively print a National Starch 33-9156 adhesive composed of a polyvinylacetate-based emulsion.
- the retention portion 48 can then be placed between the bodyside and outerside portions of face sheet 70, and the mating edges of the face sheet portions can be bonded together to provide a generally complete peripheral seal along substantially the entire perimeter of the retention portion.
- the retention portion 48 can comprise a superabsorbent laminate having superabsorbent particles segregated in separate, discrete pockets regions formed in the laminate structure.
- the laminate can include at least one, liquid permeable carrier layer which holds and maintains the superabsorbent particles in the pocket regions.
- Suitable laminate structures are described in US-A-5,539,399; EP-A-0 725 615 (U.S. Patent Application Serial No. 145,926 entitled ABSORBENT ARTICLE WHICH INCLUDES SUPERABSORBENT MATERIAL LOCATED IN DISCRETE ELONGATED POCKETS PLACED IN SELECTED PATTERNS and filed October 29, 1993 by R. Tanzer et al.).
- Surge management portion 46 is typically less hydrophilic than retention portion 48, and has an operable level of density and basis weight to quickly collect and temporarily hold liquid surges, and to transport the liquid from its initial entrance point to selected regions of absorbent structure 32, where the liquid can be substantially completely released into retention portion 48. This configuration can help prevent the liquid from pooling and collecting on the portion of the absorbent garment positioned against the wearer's skin, thereby reducing the feeling of wetness by the wearer.
- the surge management portion 46 may be a layer composed of a meltblown or spunbonded web of polyolefin fibers.
- the surge management layer may also be a bonded-carded-web composed of natural and synthetic fibers.
- the surge management portion may be composed of a substantially hydrophobic material, and the hydrophobic material may optionally be treated with a surfactant or otherwise processed to impart a desired level of wettability and hydrophilicity.
- nonwoven materials include powder-bonded-carded webs, infrared bonded carded webs, and through-air-bonded-carded webs.
- the infrared and through-air bonded carded webs can optionally include a mixture of different fibers, and the fiber lengths within a selected fabric web may be within the range of about 1.0-3.0 inch (about 2.54-7.62 cm).
- the absorbent article represented by diaper 10 can include a liquid surge management portion 46 and an absorbent retention portion 48 which is adjacently arranged in a direct, contacting liquid communication with the surge management portion.
- the surge management portion is positioned on the bodyside of retention portion 48.
- the surge management portion may be positioned on the outer side of the retention portion.
- the various embodiments can also provide an absorbent article having a surge management portion 46, which may be located on a outerside surface of topsheet 28 which faces toward backsheet 30 (Fig. 1), or alternatively, may be located on an opposite, bodyside surface of the topsheet (not shown).
- the surge management portion may be cooperatively arranged with a multi-piece topsheet.
- Such a topsheet configuration can, for example, include two, individual topsheet sections which are laterally spaced-apart from each other along the diaper cross-direction, and an intermediate surge management portion which is operatively connected to bridge therebetween. The surge management portion thereby provides the medial section of the topsheet composite assembly.
- At least a part of surge management portion 46 is located within the target zone of the absorbent structure, and in particular arrangements, the surge management portion has an areal extent which extends completely over the target zone.
- Retention portion 48 is positioned in liquid communication with surge management portion 46 to receive liquids released from the surge management portion and to hold and store the liquid.
- the surge management portion serves to quickly collect and temporarily hold discharged liquids, to transport such liquids from the point of initial contact and spread the liquid to other parts of the surge management portion, and then to substantially completely release such liquids into the layer or layers comprising retention portion 48.
- surge management portion 46 is substantially free of absorbent gelling material.
- Surge management portion 46 may, however, contain a very small amount of gelling material to help acquire an initial liquid surge, but the amount should not be excessive.
- the gelling material can cause the structure to retain and hold unacceptably high amounts of the liquid.
- the transport of liquids away from target zone 53 to other sections of absorbent structure 32, particularly retention portion 48 can be undesirably impaired.
- surge layer 46 can be a separately formed layer, which lies adjacent the outerwardly facing surface of topsheet 28 between the retention portion and topsheet.
- surge management portion 46 need not extend through the entire thickness of absorbent structure 32.
- the retention portion can optionally include a recess area which wholly or partially surrounds surge management portion 46, or the retention portion can be entirely positioned below the surge management portion.
- the arrangement which includes the recess in retention portion 48 can advantageously increase the area of contact and liquid communication between the retention portion and surge management portion 48. It should be understood, however, that surge management portion 46 could optionally be constructed to extend through the entire thickness of absorbent structure 32 so that the capillary flow of liquid into retention portion 48 occurs primarily in the generally sideways (X-Y) direction. ,
- the surge management portion can be of any desired shape consistent with the absorbency requirements of absorbent structure 32. Suitable shapes include for example, circular, rectangular, triangular, trapezoidal, oblong, dog-boned, hourglass-shaped, or oval. Preferred shapes of the surge management portion are those that increase the contacting, liquid communicating surface area between surge management portion 46 and retention portion 48 so that the relative capillarity difference between the portions can be fully utilized. In certain embodiments, the surge management portion can be generally rectangular-shaped.
- the surge layer width is within the range of about 16-100% of the topsheet width.
- the surge layer width is alternatively at least about 24% of the topsheet width, and optionally, is at least 50% of the topsheet width to provide desired levels of effectiveness.
- surge management portion 46 may extend over the complete length of retention portion 48, or may extend over only a part of the retention portion length. Where the surge management portion extends only partially along the length of the retention portion, the surge management portion may be selectively positioned anywhere along absorbent structure 32. For example, surge management portion 46 may function more efficiently when it is offset toward the front waistband of the garment and transversely centered within front section 49 of absorbent structure 32. Thus, surge management portion 46 can be approximately centered about the longitudinal center line of absorbent structure 32, and positioned primarily in central, front section of the absorbent structure 32. In the illustrated embodiment, none of surge management portion 46 is located in the ear regions of the absorbent structure.
- the basis weight of surge management portion 46 can be at least about 24 grams per square meter (gsm), alternatively is at least about 40 gsm, and optionally is at least about 45 gsm to help provide the total void volume capacity desired for effective operation.
- the basis weight is not more than about 300 gsm, alternatively, is not more than about 150 gsm, and optionally, is not more than about 100 gsm to provide desired advantages. It will be readily apparent that absorbent articles requiring more surge capacity may also require proportionally greater amounts of surge management material.
- the surge management material need not be of uniform basis weight throughout its areal extent, but instead can be arranged so that some sections have more surge management material compared to other sections.
- the front panel and front waistband region 12 of the diaper extend and curve around the front of the wearer's body
- the back panel and back waistband region 14 of the diaper extend and curve around the back of the wearer's body.
- Fastening means such as fastener tabs 36
- the diaper front waistband region forms an arc which is intended to contact the wearer's body.
- the wearer's stomach region can contract due to breathing or other movements and may, from time to time, lose contact with the diaper front waistband region. It has been found that the front arc of the wearer's stomach may decrease as much as 2.5 inches (6 cm).
- the waistband regions 12 and 14 of the article may not sufficiently contract to maintain substantially continuous contact with the changing circumference of the wearer's body.
- the diaper shown representatively in Fig. 1 employs a bridge flap 80 having a distinctive combination of extensibility, retractability, and bridge forming capability.
- a selected movable portion of the bridge flap 80 is constructed to have a high degree of retractability.
- the level of retraction can be as much as 6 cm or more. It has been found that the retracted width-wise extent of the bridge flap movable edge 84 should be at least 1 cm shorter than the retracted width of the bridge flap fixed edge 82. In further configurations, the retracted dimension of bridge flap movable edge 84 is at least about 6 cm shorter than the retracted width of the bridge flap fixed edge 82.
- the bridge flap member can be composed of a material which provides a soft, hydrophobic, non-irritating surface appointed for placement adjacent a wearer's skin.
- the bridge flap material can comprise a fibrous layer which permits a movement of gas therein and substantially avoids excessive occlusion of the wearer's skin.
- suitable materials for constructing bridge flap 80 include perforated films, such as perforated polyethylene films; nonwoven fabrics, such as spunbonded webs and bonded-carded-webs composed of synthetic polymer fibers; tissues; meltblown fibrous webs; airformed fibrous webs which have been suitably bonded to provided desired integrity; as well as laminates and other combinations thereof.
- the bridge flap material can be permeable to a passage of gas through a thickness dimension thereof.
- the bridge flap material can be highly resistant to a passage of liquid through its thickness.
- the bridge flap material can be substantially nonwettable to avoid excessive wicking and transport of liquid along its surfaces.
- the bridge flap extends over a flap surface area and is selectively elasticized to provide desired performance.
- the bridge flap can be elasticized by constructing the flap of an elastic material, such as an elastic laminate, which is stretchable along a lateral cross-direction of the article and operably elasticizes a substantial entirety of the flap surface area.
- the operable bridge flap can be elasticized by connecting at least one separate elastic member, in an elastically contractible condition, to the bridge flap.
- the elastic member is stretchable at least along the article cross-direction and operably elasticizes one or more selected strip regions of the flap surface area.
- the bridge flap 80 has a cross-directional width dimension 90, a longitudinally extending length dimension 88, a substantially fixed edge region 82, and a substantially movable edge region 84.
- the bridge flap 80 also includes side end regions 86, which may optionally be secured to the article with suitable side edge securement means 98. Where bridge flap 80 has its side end regions 86 secured to the article with side edge securement means 98, the width dimension of bridge flap fixed edge 82 is determined by the lateral distance between the side edge securement at one side edge region 86 to the securement means at the laterally opposed and distally spaced side edge region of the bridge flap.
- the diaper representatively shown in Figs. 1, 2 and 3, illustrates the configuration where the bridge flap is elasticized by a selected system of separate and discrete elastic members which are operably connected to selected strip sections of the bridge flap.
- the elastic members can be attached to either or both of the fixed and movable edge regions 82 and 84, respectively, of the bridge flap 80.
- one or more movable edge elastics such as elastics 108 and/or 109, can be operably connected to movable edge region 84 to provide selected levels of extensibility and elastic tension to the movable edge region of the bridge flap 80.
- the substantially fixed edge region 82 of bridge flap 80 can include at least one fixed edge elastic 106, and optionally can include a plurality of fixed edge elastics 106 and 107 to provide a selected level of extensibility and elastic tension to the fixed edge region 82.
- the bridge flap elastics at the movable and/or fixed edge regions of the bridge flap 80 can, for example, be provided by strands of Lycra® elastomeric material.
- the movable edge elastics 108 and/or 109 extend along at least about 15% of the cross-directional width of the movable edge 84.
- the movable edge elastics can extend along at least about 50%, and optionally about 80% of the cross-directional width of the movable edge to provide improved performance.
- the movable edge elastics extend along approximately 100% of the cross-directional width of the movable edge 84. If the movable edge elastics are too short, the bridge flap 80 may not adequately span across gaps occurring along the article waistband.
- the elasticized, lateral retractability of the bridge flap movable edge region 84 may be at least about 10 percent. Alternatively, the elasticized retractability is at least about 25 percent, and optionally is at least about 40 percent to provide improved performance.
- the retractability of a selected region of the article can be determined by the following formula: (A-B) A x 100 percent; wherein
- the elasticization of the bridge flap movable edge 84 can provide a total elastic tension of at least about 10 grams force along the movable edge 84.
- the elastic tension is at least about 15 grams force, and optionally is at least about 20 grams force,to provide desired benefits.
- the elastic tension provided at the movable edge 84 can be not more than about 250 grams force.
- the elastic tension is not more than about 200 grams force, and optionally is not more than about 150 grams force to provide improved performance.
- bridge flap movable edge section 84 If the retractability and elastic tension of bridge flap movable edge section 84 is too small, the bridge flap may have insufficient ability to span across any gaps which may be produced between the article waistband and the wearer's body. If the elastic tensions are too large, the lateral ends of the article waistband portion may be excessively pulled in toward the lateral center of the diaper, and create undesired tucks and folds at the lateral ends of the front waistband portion 12 of the article.
- bridge flap 80 can have a width dimension of at least about 10 cm.
- the bridge flap member can have a width dimension of at least about 12.5 cm, and optionally can have a width dimension of at least about 15 cm.
- bridge flap 80 can have a width dimension 90 which is not more than about 35.5-40.6 cm. More particularly, the width dimension can be not more than about 38 cm. Alternatively, the bridge flap width dimension can be not more than about 36 cm, and optionally can be not more than about 33 cm to provide desired performance.
- the bridge flap 80 can also have a length dimension 88 which is at least about 0.5 cm. Alternatively, the bridge flap length dimension is at least about 0.8 cm, and optionally is at least about 1 cm.
- the bridge flap length is not less than about 4 cm.
- the bridge flap 80 can have a length dimension which is not more than about 9-12.7 cm. More particularly the length dimension can be not more than about 10 cm. Alternatively, the bridge flap length dimension is not more than about 9 cm, and optionally is not more than about 7.5 cm to provide desired performance.
- bridge flap 80 can have a width dimension of at least about 25.4 cm.
- the bridge flap member can have a width dimension of at least about 30.5 cm, and optionally can have a width dimension of at least about 35.5 cm.
- bridge flap 80 can have a width dimension 90 which is not more than about 89 cm.
- the bridge flap width dimension can be not more than about 76 cm, and optionally can be not more than about 63.5 cm to provide desired performance.
- the bridge flap 80 can also have a length dimension 88 which is at least about 2.5 cm.
- bridge flap length dimension is at least about 3.8 cm, and optionally is at least about 5 cm.
- bridge flap 80 has a length dimension which is not more than about 15.5 cm.
- the bridge flap length dimension is not more than about 12.7 cm, and optionally is not more than about 10.2 cm to provide desired performance.
- the substantially fixed edge 82 of the bridge flap 80 is operably attached to a body-facing surface of the article, such as the bodyside surfaces of topsheet 28 and containment flaps 62 (Fig. 1), as well as side panels 56 (Fig. 4).
- the desired attachments between bridge flap 80 and the bodyside surface of the article can be provided by any suitable securing means.
- the securing means may comprise adhesive bonds, thermal bonds, ultrasonic bonds, or the like, as well as combinations thereof.
- the attachments along bridge flap fixed edge 82 and along bridge flap side end regions 86 can be configured to provide a liquid-resistant, substantially liquid-impermeable barrier seal between the fixed edge region of the bridge flap member and the immediately underlying section of the article.
- the liquid-resistant barrier can be constructed to extend from barrier flap 80 to backsheet layer 30.
- the bridge flap can include laterally opposed, longitudinally extending side end regions 86.
- the side edge regions of bridge flap 80 can also include longitudinally extending securement means 98 for operably attaching the bridge flap to selected portions of the article.
- the securement means 98 provide liquid-resistant barrier seals between the bridge flap member 80 and the appointed attached sections of the article, such as topsheet 28 or side panel members 56.
- the barrier seals can help prevent undesired migration of liquid through the topsheet layer material at the longitudinally outboard waistband edge or the laterally outboard edges of the bridge flap.
- the laterally extending, elasticized bridge flap 80 can be connected to extend over the body-facing surface of the article, and can be constructed to extend laterally beyond the opposed side edge regions 40 of at least one waistband portion, such as the front waistband portion, of the backsheet layer 30.
- the appointed waistband section of the article can include a pair of laterally opposed, front side panels 56.
- the front side panels 56 can be elastically extensible at least along the article cross-dimension 24.
- side panels 56 may be constructed of a stretch bonded laminate or a neck bonded laminate material.
- the illustrated construction and arrangement also representatively show a diaper where a substantial entirety of the bridge flap 80 is constructed of an elastomeric material.
- the bridge flap can be substantially entirely composed of a stretch bonded laminate (SBL), a neckbonded laminate (NBL), or the like.
- the absorbent article representatively shown in Fig. 4 further comprises an elasticized, front side panel member 56 connected to extend laterally from each of a pair of laterally opposed side edge regions, such as edge regions 44, of at least one waistband portion, such as the front waistband portion 12, of backsheet layer 30.
- the front side panels can operably have various shapes, such as the illustrated rectangular shape. Alternatively, the shape can be trapezoidal, parabolic, semi-elliptical, or the like.
- Each of the side panel members 56 has a portion thereof connected to bridge flap 80, and has a longitudinal extending length dimension so which is not less than the length dimension 88 of the bridge flap.
- the bridge flap length dimension may be not more than about 120% of the length of the side panel 56. Alternatively, the bridge flap length is not more than about 90%, and optionally is not more than about 70% percent of the length of the associated side panel 56.
- the length of bridge flap 80 may be not less than about 10%, and optionally is not less than about 20% percent of the length dimension of the side panel 56 to provide desired performance.
- Each of the front side panel members 56 extends laterally to a location which is laterally outboard of the terminal side edge region 86 of bridge flap 80.
- Side panel 56 can extend laterally or at least about 10 percent of the lateral width 54 of side panel 56.
- bridge flap 80 can extend over at least about 60 percent, and optionally at least about 90 percent of the cross-directional width 54 of the side panels.
- the representatively shown embodiments of the article of the invention employ article fasteners 36 which have a factory-bond region secured to the back waistband region 14 of the article.
- Alternative configurations can have the article fasteners 36 factory bonded to the lateral end portions of the front waistband region 12 of the article. The latter configuration would then have a front-to-back fastening system.
- the front-to-back fastening system can provide a more effective activation of bridge flap 80.
- the front-to-back fastening system exerts a tensile force onto the side end regions 86 of bridge flap 80 and can more efficiently utilize the entire elasticized width of the bridge flap.
- Some users may find the front-to-back fastening system inconvenient. Accordingly, such users may prefer the more conventional back-to-front fastening system, such as illustrated in the representatively shown embodiments.
- the effectiveness of bridge flap 80 can be improved by providing a width dimension 90 which is at least about 1/2 the normal circumference of the waist section of the intended wearer.
- the bridge flap member can overlap and desirably extend past each of the two hip points of the wearer.
- the lateral end sections 86 of the bridge flap 80 can more effectively be held in frictional engagement against the wearer's hip points and against the contacting portions of back waistband region 14 to hold the elasticized movable edge region 84 in an elastically extended condition.
- the cooperative engagement between the end sections of the bridge flap and the hip point regions of the wearer can help to hold and maintain the bridge flap member in a stretched condition, and can improve the operational effectiveness of the bridge flap member 80.
- supplemental bridge flap fasteners 102 With reference to Figs. 1 and 2, the representatively shown supplemental bridge flap fasteners are located at the side end regions of the front waistband region of backsheet 30.
- the supplemental fasteners 102 are positioned on an outward facing surface of the backsheet and are arranged to operably connect and fasten to an inner surface of the back waistband portion of the article.
- the supplemental bridge flap fasteners can, for example, comprise an adhesive fastening mechanism, a mechanical fastening mechanism, a cohesive fastening mechanism or the like, as well as combinations thereof.
- supplemental fasteners 102 are provided by a micro-hook type of mechanism. Such micro-hooks are available from Minnesota Mining and Manufacturing, a business having offices in St. Paul, Minnesota. In the illustrated embodiments, the micro-hooks are configured to operably attach to the material comprising topsheet 28.
- the representatively shown configuration includes supplemental fasteners 102 located at the laterally distal side end regions 42 of the side panels 56.
- the supplemental fasteners 102 can extend longitudinally along substantially the entire length dimension 50 of the side panel 56.
- the supplemental fasteners 102 may extend partially along the side panel length. Where the supplemental fastener 102 extends along only a portion of the side panel length 50, it can be desirable to position the supplemental fastener 102 relatively more closely adjacent to the longitudinally outboard edge of the article waistband.
- the article is placed upon the wearer, and a first fastener tab 36 is secured to an appointed section of the front waistband region 12.
- the first supplemental bridge flap fastener 102 can then be secured to an inner bodyside surface of the article.
- the user typically holds the front waistband in a desired position and applies a selected level of tension to the remaining unattached end of the rear diaper waistband section 14 prior to securing the second fastener tab 36 onto the front waistband region 12 of the article.
- the second supplemental bridge flap fastener 102 can be attached to the inner bodyside surface of the article to hold and maintain a desired elastic extension and elastic tension in a selected portion of the bridge flap 80, such as at movable edge 84.
- the bridge flap 80 can have a width dimension of at least about 7.5 cm.
- the bridge flap member can have a width dimension of at least about 10 cm, and optionally can have a width dimension of at least about 12.5 cm.
- Bridge flap 80 can have a width dimension 90 which is not more than about 34-38.1 cm. More particularly, the width dimension can be not more than about 37.1 cm. Alternatively, the bridge flap width dimension can be not more than about 34 cm, and optionally can be not more than about 33.3 cm to provide desired performance.
- Bridge flap 80 can also have a length dimension 88 which is at least about 1.6 cm. Alternatively, the bridge flap length dimension is at least about 2.4 cm, and optionally is at least about 2.5 cm.
- Bridge flap 80 may have a length dimension which is not more than about 8-12.7 cm. More particularly the length dimension can be not more than about 10 cm. Alternatively, the bridge flap length dimension is not more than about 8 cm, and optionally is not more than about 7.5 cm to provide desired performance.
- the bridge flap 80 can have a width dimension of at least about 25.4 cm.
- the bridge flap member can have a width dimension of at least about 30.5 cm, and optionally can have a width dimension of at least about 35.5 cm.
- the bridge flap 80 can have a width dimension 90 which is not more than about 89 cm.
- the bridge flap width dimension can be not more than about 76 cm, and optionally can be not more than about 63.5 cm to provide desired performance.
- the bridge flap 80 can also have a length dimension 88 which is at least about 2.5 cm.
- the bridge flap length dimension is at least about 3.8 cm, and optionally is at least about 5 cm.
- the bridge flap 80 may have a length dimension which is not more than about 15.5 cm.
- the bridge flap length dimension is not more than about 12.7 cm, and optionally is not more than about 10.2 cm to provide desired performance.
- elasticized fastener panels 100 can be attached at the back waistband section 14 of the article. Accordingly, when the fastener panels 100 are pulled and tensioned-to secure the fastener tabs 36 and fit the article on the wearer, the tension can be transmitted to at least a portion of the bridge flap 80 to help stretch the bridge flap. Due to the bridge flap construction, the stretching operation causes a displacement of the bridge flap movable edge 84 which urges the movable edge into an operable contact against the wearer's body. This can bridge any spacing distance that might occur between the topsheet 28 and the wearer's skin, and can form an effective pocket capable of trapping any free-flowing liquid. The trapped liquid can then be more effectively absorbed by the retention portion of the absorbent structure.
- Figs. 4 and 6 also representatively show a configuration having a supplemental, rear bridge flap member 81 connected to the rear waistband portion of the diaper.
- the construction of the rear bridge flap can be the same as or similar to the construction of the primary, front bridge flap member 80.
- the attachments of the rear flap 81 to the diaper can be the same as or similar to the attachments described with respect to the front bridge flap 80.
- the longitudinally outboard edge of rear flap 81 can be substantially fixed to the diaper with attachments 76
- the lateral side regions of the rear flap 81 can be substantially fixed to the laterally opposed pair of rear fastener panels 100 or topsheet 28 with side attachments 98
- the longitudinally inboard edge of rear flap 81 can be movable and operably elasticized, in accordance with the arrangements described herein. Accordingly, when the fastener panels 100 are pulled and tensioned to secure the fastener tabs 36 and fit the article on the wearer, the tension can be transmitted to at least a portion of the rear bridge flap 81 to help stretch the rear bridge flap.
- the stretching operation causes a displacement of the movable edge of the rear bridge flap 81 which urges the movable edge into an operable contact against the wearer's body.
- This can bridge any spacing distance that might occur between the topsheet 28 and the wearer's skin, and can form an effective rear pocket capable of trapping any free-flowing liquid at the back waistband region of the article.
- a longitudinally terminal edge of the user bond region of fastener tab 36 is spaced from the longitudinally terminal edge of article 10 by a first discrete distance 118.
- the movable edge region 84 of bridge flap 80 is spaced from the opposite, longitudinally terminal edge of the article by a second discrete distance 120.
- distance 118 should be less than distance 120. If distance 118 is too large, the use of fastener tabs 36 may undesirably interfere with the operation of bridge flap 80. In particular, the fastener tabs, when employed to secure the article on the wearer, can excessively interfere with the desired retraction of the bridge flap movable edge.
- the degree of elasticized gathering of the movable edge region 84 should be sufficient to operably direct the movable edge region away from topsheet 28 to produce a spanning, bridge-like configuration which can maintain the movable edge region in a substantially continuous contact with the wearer's body.
- the elasticization should be regulated and limited to avoid excessive curling in of the lateral ends of the article. Such curling can interfere with the desired operation of the bridge flap, and can make the article more difficult to apply onto the wearer's body.
- the differential in extensibility between fixed edge region 82 and movable edge region 84 can be provided by various techniques and structures.
- the elastic members at movable edge region 84 may have a greater cross-directional extent than the elastics located at fixed edge region 82.
- a different type of elastomeric material having a lower level of extensibility may be located at the fixed edge region 82 of the bridge flap 80.
- stiffening members may be employed to restrict the extensibility at the fixed edge region 82.
- the bridge flap 80 is desirably configured to overlie a body-facing surface of the containment flaps. Accordingly, the bridge flap is superposed over the containment flaps and can be positioned between the containment flaps and the wearer's body. Thusly arranged, the bridge flap can more effectively bridge across any gaps between topsheet 28 and the wearer's body, and can more effectively maintain a substantially continuous contact against the wearer.
- the bridge flap movable edge 84 may be substantially independent of and substantially unsecured to the containment flaps. More particularly, the movable edge is substantially unsecured to the containment flap movable edges 66. As a result, the extensibility and contractibility of the bridge flap movable edge 84 is substantially unrestricted by the containment flaps, and the bridge flap can provide a more independent and effective bridging operation.
- Bridge flap 80 is desirably assembled into the article while the bridge flap is in an elastically contractible condition.
- suitable techniques for assembling the bridge flap into the article include applying and attaching a prestretched bridge flap onto the topsheet 28.
- the bridge flap 80 may be composed of a heat-shrinkable, or otherwise heat activatable material. After securement to the desired portion of topsheet 28, the bridge flap material can be activated to elastically contract the bridge flap along its lateral width dimension.
- the bridge flap movable edge region 84 is desirably configured to bridge a distance of at least about 0.5 cm. Alternatively, the movable edge region can bridge a distance of at least about 1 cm. In other configurations, the movable edge region 84 can bridge a distance of up to about 8 cm, and optionally can bridge a distance of up to about 10 cm to provide improved performance.
- the present invention provides an absorbent article having at least one elasticized side panel 58 connected to a lateral end region 40 of the back waistband portion 14 of the article.
- the side panel 58 is constructed for interconnecting with a cooperating section of the article to thereby form an assembled bridge flap 180 (e.g. Fig. 8) which extends about a wearer and is arranged to provide a bodyside surface for contacting the wearer's body.
- the cooperating section of the side panel 58 includes fastening means, such as provided by fasteners 74, for securing each of the side panels 58 about the wearer.
- the article includes waistband fastening means, such as provided by fasteners 36, for securing the article front waistband portion to the article back waistband portion to thereby encircle the wearer with the waistband portions.
- the article also includes a waistband-edge attaching means 112 for securing a laterally extending, longitudinally outboard waistband edge of the assembled bridge flap to an appointed, cooperating section of the front waistband portion of the article.
- the absorbent article can optionally have a pair of elasticized side panels connected at laterally opposed end regions of the back waistband portion of the article, and each of the side panels can include a portion of the waistband-edge attaching means 112.
- the waistband fasteners 36 have their factory-bond sections connected to the front waistband region of the article, and are arranged to have their user-bond sections connect to the back waistband region of the article during use.
- the fasteners 36 can have their factory-bond sections connected to the back waistband region of the article, and can be arranged to have their user-bond sections connect to the front waistband region of the article during use.
- the fasteners 36 can be operably connected to intermediate fastener panels.
- elasticized fastener panels 100 can be connected to the fasteners 36 in the arrangement illustrated in Fig. 4.
- the attaching means 112 can be composed of an adhesive attachment, a cohesive attachment, an interlocking mechanical attachment or the like, as well as combinations thereof.
- the waistband-edge attaching means is configured to operably connect with a cooperating section, such as an inward bodyside surface of the article, which is located along and/or proximate a longitudinally terminal edge of the front waistband region 12 of the article.
- a cooperating element of the attaching mechanism can be operably secured to an appointed article section, such as a bodyside surface of topsheet 28.
- the resultant waistband-edge attachment can provide a liquid-resistant seal which can effectively block the escape of liquid and thereby help to reduce leakage.
- yet another embodiment of the invention includes at least one elasticized rear side panel 58 which connects at an end region 40 of the back waistband portion 14 of the article, and includes a foldable section 60 which can be folded longitudinally along a laterally extending fold line.
- Alternative configurations of the invention can include a pair of elasticized rear side panels 58 which are connected at laterally opposed end regions 40 of the back waistband portion 14 of the article. Where a pair of side panels 58 are employed, the side panels may be unequal in size or may be substantially equal in size.
- Fig. 7A incorporates an asymmetric arrangement having a relatively large side panel 58 configured to wrap around the front of the wearer's torso.
- the side panel 58 includes the foldable section 60 which extends length-wise past a longitudinally terminal edge 94 of the backsheet layer 30.
- a second relatively smaller side panel 58 does not include a foldable section 60.
- the shown, relatively smaller side panel 58 does include a pair of flap fasteners 74 factory bonded to a laterally terminal end region of the side panel.
- the illustrated fasteners 74 are shown in a folded over storage condition against an inner bodyside surface of the smaller side panel 58.
- both of the side panels 58 can include the extending foldable section 60.
- Each rear side panel 58 can include a foldable section 60 which extends laterally along at least about 50% of the width-wise extent of the rear side panel. Alternatively, the foldable section extends at least about 75%, and optionally about 100% of the width-wise extent of the rear side panel 58. In the illustrated embodiment the foldable section 60 extends laterally along at least about 100% of the width-wise extent of the rear side panel 58. The foldable section also extends longitudinally past a longitudinally terminal edge 94 of the backsheet layer 30 by a border distance 114 of at least 1 cm. Alternatively, the border distance is at least about 1.3 cm to provide improved performance. In other embodiments of the invention, border distance 114 can measure up to about 3.8 cm. Alternatively, the border distance can measure up to about 5.7 cm to provide desired benefits.
- the waistband-edge attaching means can be configured to provide a suitable fold attachment means 104.
- the fold attachments 104 can be constructed to hold the foldable sections 60 of the side panels 58 in a substantially C-folded condition which can wrap about a laterally extending, terminal edge 96 of the article front waistband portion 12. Accordingly, the fold attachments 104 can operably connect to an appointed section of the outerside surface of the article. The appointed section can typically extend laterally along and proximate to the terminal edge of the front waistband portion.
- Alternative arrangements of the invention can include a combination of the internal waistband-edge attaching means 112 and the fold attachments 104.
- the rear side panels 58 are constructed for interconnecting with each other about a wearer's body to thereby form an assembled bridge flap 180, which is arranged to provide a bodyside surface for contacting the wearer.
- a securing means such as flap fasteners 74 can be employed to form the assembled bridge flap.
- the flap fasteners can be constructed of any suitable fastening mechanism, such as an adhesive fastening mechanism, a mechanical fastening mechanism, a cohesive fastening mechanism or the like, as well as combinations thereof.
- rear side panels 58 can be the same as or similar to the materials employed to construct front side panels 56 and bridge flap 80. Accordingly, the rear side panels 58 can be elasticized by constructing the rear side panels of an elastic material, such as an elastic laminate, which is stretchable along a lateral cross-direction of the article and operably elasticizes a substantial entirety of the side panel surface area. Alternatively, the rear side panel 58 can be elasticized by connecting at least one separate elastic member, in an elastically contractible condition, to the rear side panel in constructions similar to those previously discussed.
- an elastic material such as an elastic laminate
- the assembled bridge flap 180 has an assembled width dimension of at least about 7.6 cm.
- the assembled bridge flap has an assembled width dimension of at least about 10 cm, and optionally has an assembled width dimension of at least about 12.7 cm.
- the assembled bridge flap can have an assembled width dimension of not more than about 26-36.8 cm. More particularly, the assembled width dimension can be not more than about 30.5 cm. Alternatively, the assembled width dimension can be not more than about 26 cm, and optionally can be not more than about 24 cm to provide desired benefits.
- assembled bridge flap 180 has an assembled length dimension 88 which is at least about 1.9 cm.
- the assembled length of the bridge flap 180 is at least about 2.5 cm, and optionally, is at least about 3 cm to provide desired performance.
- Assembled bridge flap 180 can also have an assembled length dimension which is not more than about 8.5-12.7 cm for the child or infant sized articles. More particularly, the assembled length dimension can be not more than about 10.2 cm. Alternatively, the length dimension is not more than about 8.5 cm, and optionally is not more than about 7.7 cm to provide desired benefits.
- assembled bridge flap 180 can have an assembled width dimension of at least about 30.5 cm. Alternatively, the assembled bridge flap has an assembled width dimension of at least about 45.7 cm, and optionally has an assembled width dimension of at least about 50.8 cm. In addition, the assembled bridge flap of the adult-sized article can have an assembled width dimension of not more than about 101.6 cm. Alternatively, the assembled width dimension can be not more than about 89 cm, and optionally can be not more than about 76.2 cm to provide desired benefits. In other aspects of the ⁇ adult-sized article, assembled bridge flap 180 can have an assembled length dimension 88 which is at least about 7.6 cm. Alternatively, the assembled length of the bridge flap 180 is at least about 10 cm, and optionally, is at least about 11 cm to provide desired performance. The adult-sized assembled bridge flap 180 can also have an assembled length dimension which is not more than about 23 cm for the adult-sized articles. Alternatively, the length dimension is not more than about 16 cm, and optionally is not more than about 15.2 cm to provide desired benefits.
- the article fastening means such as provided by fastener tabs 36, secure the article front waistband portion 12 to the article back waistband portion 14 to thereby encircle the wearer with the article waistband portions (Fig 9.).
- the extending foldable sections 60 can then be wrapped around a laterally extending, terminal edge 96 of the article front waistband portion 12 into a C-folded condition (Figs. 10 and 11).
- An additional attaching means such as fold attachments 104, is employed to hold the foldable sections 60 of the side panels 58 in the C-folded condition.
- the fold attachments 104 can be provided by any suitable attaching mechanism, such as adhesives, cohesives, snaps, hooks, VELCRO® fasteners and the like, as well as combinations thereof.
- the assembled bridge flap 180 and the cooperating foldable sections 60 can provide a more secure conformity to the wearer's body, and can provide a more effective seal against the leakage of liquid.
- the bridge flap is capable of spanning across any gaps that may develop between the wearer's body and the front panel of the diaper. As a result, liquid can be more effectively held inside the diaper, and the absorbent structure has more time in which to absorb the liquid.
- the relatively wide bridge flap 180 can wrap around a greater proportion of the wearer's body to help support the front panel of the diaper and to reduce the tendency to droop at the diaper front panel.
- the side panels 56 and 58 and/or the fastener panels 100 can comprise a substantially nonwettable material, which may be fibrous.
- the nonwettable characteristic can help reduce undesired movement or wicking of liquids along the surfaces of the panels.
- the bridge flap 80 (or 180) can be constructed and arranged to overlie selected longitudinal end sections 78 of the absorbent structure, such as the longitudinal end regions of retention portion 48. As a result, the bridge flap can more effectively reduce leakage and a laterally extending, substantially liquid impermeable, sealing attachment 76 can block the flow of liquid.
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Claims (7)
- Absorbierender Artikel (10) mit einem vorderen Taillenbundabschnitt (12), einem hinteren Taillenbundabschnitt (14) und einem Zwischenabschnitt (16), der den vorderen und hinteren Taillenbundabschnitt miteinander verbindet, wobei der Artikel eine Längsachse (26) und eine Querachse (24) aufweist, wobei der Artikel umfasst:eine Unterlagsschicht (30);einen absorbierenden Rückhalteabschnitt (48), der auf der Unterlagsschicht (30) angeordnet ist;eine flüssigkeitsdurchlässige Vorderschicht (28), die auf dem Rückhalteabschnitt (48) angeordnet und damit verbunden ist, um den Rückhalteabschnitt (48) zwischen der Vorderschicht (28) und der Unterlagsschicht (30) aufzunehmen;wenigstens eine elastische Seitenbahn (58), die mit einem lateralen Endbereich (40) des hinteren Taillenbundabschnittes (14) des Artikels verbunden ist, wobei die Seitenbahn (58) so konstruiert ist, dass sie sich um den Körper eines Trägers mit dem Artikel verbindet, um dadurch eine zusammengesetzte Brückenklappe (180) zu bilden, wobei die zusammengesetzte Brückenklappe (180) so angeordnet ist, dass sie eine körperseitige Oberfläche zum Kontakt mit dem Träger bereitstellt; Verschlussmittel (36) zum Befestigen des vorderen Taillenbundabschnittes (12) des Artikels am hinteren Taillenbundabschnitt (14) des Artikels, um dadurch den Träger mit den Taillenbundabschnitten des Artikels zu umgeben; dadurch gekennzeichnet, dass er des Weiteren Taillenbundkanten-Befestigungsmittel (112, 104) umfasst, die auf wenigstens einer elastischen Seitenbahn (58) bereitgestellt sind, um eine Taillenbundkante der zusammengesetzten Brückenklappe (180) am vorderen Taillenbundabschnitt (12) des Artikels zu befestigen.
- Absorbierender Artikel (10) gemäß Anspruch 1, wobei die wenigstens eine elastische Seitenbahn (58) einen faltbaren Abschnitt (60) umfasst, der sich der Länge nach über eine in Längsrichtung gelegene Endkante (94) der Unterlagsschicht (30) hinaus erstreckt, und wobei der Artikel Faltenbefestigungsmittel (104) umfasst, um die faltbaren Abschnitte (60) der Seitenbahnen (58) in einem C-gefalteten Zustand zu halten, die sich beim Gebrauch um eine sich lateral erstreckende Endkante (96) des vorderen Taillenbundabschnittes (12) des Artikels wickeln können.
- Absorbierender Artikel gemäß Anspruch 2, wobei der Artikel (10) ein Paar lateral gegenüberliegender elastischer Seitenbahnen (58) umfasst, die an lateral gegenüberliegenden Endbereichen (40) des hinteren Taillenbundabschnittes 14 des Artikels (10) verbunden sind, wobei die Seitenbahnen (58) faltbare Abschnitte (60) umfassen, die sich der Länge nach über eine in Längsrichtung gelegene Endkante (94) der Unterlagsschicht (30) hinaus erstrecken, wobei die Seitenbahnen (58) so konstruiert sind, dass sie sich miteinander um den Körper eines Trägers verbinden, um dadurch eine zusammengesetzte Brückenklappe (180) zu bilden.
- Absorbierender Artikel gemäß einem der Ansprüche 2 oder 3, wobei die faltbaren Abschnitte (60) einen sich in Längsrichtung erstreckenden Grenzabstand (114) von wenigstens 1 cm aufweisen.
- Absorbierender Artikel (10) gemäß einem der Ansprüche 2 bis 4, wobei die elastischen Seitenbahnen (58) wenigstens einen Klappenverschluss (74) umfassen, um die Seitenbahnen (58) miteinander um den Körper eines Trägers zu verbinden, um dadurch die zusammengesetzte Brückenklappe (180) zu bilden.
- Absorbierender Artikel (10) gemäß einem der vorhergehenden Ansprüche, wobei das Taillenbund-Befestigungsmittel (112, 104) einen Klebstoff umfasst.
- Absorbierender Artikel (10) gemäß einem der Ansprüche 1 bis 5, wobei das Taillenbundkanten-Befestigungsmittel (112, 104) einen ineinandergreifenden mechanischen Befestigungsmechanismus umfasst.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US286083 | 1994-08-03 | ||
US08/286,083 US5593401A (en) | 1994-08-03 | 1994-08-03 | Absorbent article with bridge flap |
EP95926699A EP0773770B1 (de) | 1994-08-03 | 1995-07-14 | Absorbierender artikel mit an der taille dichtender brückenklappe |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95926699A Division EP0773770B1 (de) | 1994-08-03 | 1995-07-14 | Absorbierender artikel mit an der taille dichtender brückenklappe |
Publications (3)
Publication Number | Publication Date |
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EP1084687A2 EP1084687A2 (de) | 2001-03-21 |
EP1084687A3 EP1084687A3 (de) | 2001-07-25 |
EP1084687B1 true EP1084687B1 (de) | 2004-03-31 |
Family
ID=23096996
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95926699A Expired - Lifetime EP0773770B1 (de) | 1994-08-03 | 1995-07-14 | Absorbierender artikel mit an der taille dichtender brückenklappe |
EP00127719A Expired - Lifetime EP1084687B1 (de) | 1994-08-03 | 1995-07-14 | Absorbierender Artikel mit zusammengesetzter Brückenklappe |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95926699A Expired - Lifetime EP0773770B1 (de) | 1994-08-03 | 1995-07-14 | Absorbierender artikel mit an der taille dichtender brückenklappe |
Country Status (12)
Country | Link |
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US (2) | US5593401A (de) |
EP (2) | EP0773770B1 (de) |
JP (1) | JP3602134B2 (de) |
KR (1) | KR100393871B1 (de) |
AU (2) | AU690725B2 (de) |
CA (2) | CA2143237A1 (de) |
DE (3) | DE69532833T2 (de) |
ES (2) | ES2215554T3 (de) |
MX (1) | MX9700558A (de) |
TW (1) | TW350324U (de) |
WO (1) | WO1996003951A2 (de) |
ZA (1) | ZA956368B (de) |
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-
1994
- 1994-08-03 US US08/286,083 patent/US5593401A/en not_active Expired - Lifetime
-
1995
- 1995-02-23 CA CA002143237A patent/CA2143237A1/en not_active Abandoned
- 1995-07-14 ES ES00127719T patent/ES2215554T3/es not_active Expired - Lifetime
- 1995-07-14 DE DE69532833T patent/DE69532833T2/de not_active Expired - Fee Related
- 1995-07-14 CA CA002196602A patent/CA2196602A1/en not_active Abandoned
- 1995-07-14 KR KR1019970700691A patent/KR100393871B1/ko not_active IP Right Cessation
- 1995-07-14 ES ES95926699T patent/ES2183880T3/es not_active Expired - Lifetime
- 1995-07-14 JP JP50652996A patent/JP3602134B2/ja not_active Expired - Fee Related
- 1995-07-14 DE DE69528590T patent/DE69528590T2/de not_active Expired - Fee Related
- 1995-07-14 EP EP95926699A patent/EP0773770B1/de not_active Expired - Lifetime
- 1995-07-14 DE DE29522409U patent/DE29522409U1/de not_active Expired - Lifetime
- 1995-07-14 WO PCT/US1995/008888 patent/WO1996003951A2/en active IP Right Grant
- 1995-07-14 MX MX9700558A patent/MX9700558A/es not_active IP Right Cessation
- 1995-07-14 AU AU30989/95A patent/AU690725B2/en not_active Ceased
- 1995-07-14 EP EP00127719A patent/EP1084687B1/de not_active Expired - Lifetime
- 1995-07-25 TW TW085216590U patent/TW350324U/zh unknown
- 1995-07-31 ZA ZA956368A patent/ZA956368B/xx unknown
- 1995-12-01 US US08/566,343 patent/US5695488A/en not_active Expired - Lifetime
-
1998
- 1998-03-04 AU AU56456/98A patent/AU698415B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
EP0773770B1 (de) | 2002-10-16 |
MX9700558A (es) | 1997-05-31 |
DE69528590T2 (de) | 2003-06-26 |
AU5645698A (en) | 1998-05-21 |
KR970704399A (ko) | 1997-09-06 |
DE69532833D1 (de) | 2004-05-06 |
EP1084687A3 (de) | 2001-07-25 |
AU690725B2 (en) | 1998-04-30 |
AU698415B2 (en) | 1998-10-29 |
US5593401A (en) | 1997-01-14 |
ZA956368B (en) | 1996-03-12 |
KR100393871B1 (ko) | 2003-09-19 |
CA2143237A1 (en) | 1996-02-04 |
JP3602134B2 (ja) | 2004-12-15 |
DE69528590D1 (de) | 2002-11-21 |
JPH10504741A (ja) | 1998-05-12 |
ES2215554T3 (es) | 2004-10-16 |
WO1996003951A3 (en) | 1996-05-23 |
US5695488A (en) | 1997-12-09 |
CA2196602A1 (en) | 1996-02-15 |
AU3098995A (en) | 1996-03-04 |
DE29522409U1 (de) | 2003-03-13 |
EP1084687A2 (de) | 2001-03-21 |
ES2183880T3 (es) | 2003-04-01 |
DE69532833T2 (de) | 2004-08-19 |
TW350324U (en) | 1999-01-11 |
EP0773770A1 (de) | 1997-05-21 |
WO1996003951A2 (en) | 1996-02-15 |
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